Hydraulic jack extension



FIG. 1 is a perspective view of the hydraulic jack extension of my new design showing it mounted on a conventional hydraulic jack.

FIG. 2. Is a perspective view of the hydraulic jack extension of my new design.

FIG. 3 is an elevation view of the front thereof. An elevational view of the back is a mirror image thereof.

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof.

The broken line figure shown in FIG. 1, depicting a conventional hydraulic jack, is an environmental element and forms no part of my new design. 

CLAIM The ornamental design for a hydraulic jack extension, as shown and described. 